Fix a few apparent TBA world consistency errors. (#65)

These are mostly cases of confusion between the "on the body"
and "about the body" slots (5 and 12).

But, there are also some that seem to just be misconfigured,
like non-weapons being wielded, worn items being unwearable,
weapons being worn instead of wielded, and items being worn
instead of held.

I have an independent MUD codebase that reads these files, and
so this gives me an ability to somewhat orthogonally test these,
and easily find this sort of issue.

I did avoid all the cases where it was clear this was done
intentionally, like all the cases where the second neck was
used for the missing face slot (masks, etc).

The ones fixed here all seem to really be (minor) bugs.

lib/world/zon/313.zon

@@ -18,7 +18,7 @@ R 0 31353 31326 -1 	(an unidentifiable body part)
 O 0 31326 3 31353 	(an unidentifiable body part)
 M 0 31310 1 31353 	(Jon Boggins)
 E 1 31314 100 16 	(a three-pronged pitch fork)
-E 1 31315 100 5 	(a homemade leather vest)
+E 1 31315 100 12 	(a homemade leather vest)
 E 1 31316 100 7 	(a pair of sewn leather pants)
 M 0 31304 5 31353 	(a goblin scout)
 E 1 31301 100 5 	(some goblin scrap armor)